I went with the buddy belt because of its shape. Kaji is not a square or a rectangle so I'm not sure how comfortable that one is. I also like that the BB is secure. Not that the choke free isn't. Haven't tried it.
Been using the BB exclusively for 2 years now, and it works great under and over clothes. Especially the naturals BB Kaji got for his birthday last year. It's so thin and buttery soft.